Basic Documentation

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Siemens RWD Primary Controls Modbus Interface CB1P3099en_01
Building Technologies Product Overview 27.10.2009
2 Product Overview
The SEZ50MB enables remote monitoring on RWD devices in the same Modbus
network. Please referred to SEZ50MB datasheet CB1N3099.
The SEZ50MB product is shown as below:
There are terminals, connector and indicator on the SEZ50MB summarizing in the
following table:
SEZ50MB Interface Terminals, Connector and Indicator
AC 24 V SELV Power Supply Interface (G, G0)
Modbus RS485 Interface (+, -, Ref)
RS232 Interface (DB9 Male Connector)
The Amber LED Indicator
Power Supply Connection & Communication (it will flash when data going in/out from SEZ50MB)
AC 24 V SELV Power Supply Interface (2-Pin Terminal)
G & G0 terminals are for AC 24 V SELV power supply (LED indicates power on)
Modbus RS485 Interface (3-Pin Terminal)
+, - Differential Signals
Ref Differential COMMON
SEZ50MB Overview
Interface Summary
Interface Descriptions